When upgrading your home’s water heating system, finding the best tankless water heater can make a significant difference. Tankless water heaters, also known as on-demand water heaters, provide hot water only when needed, saving energy and space compared to traditional tank water heaters. In this comprehensive guide, we’ll explore the top 7 best tankless water heaters available in 2024, their features, benefits, and how to choose the right one for your home.
What is a Tankless Water Heater?
Best Tankless Water Heater A tankless water heater is a modern, energy-efficient appliance that heats water directly without the use of a storage tank. When you turn on a hot water tap, cold water travels through a pipe and into the unit, where it is heated by either a gas burner or an electric element. This process ensures a continuous supply of hot water, eliminating the need for a bulky tank.
Advantages of a Tankless Water Heater
- Energy Efficiency: Tankless water heaters only heat water when needed, reducing energy consumption by up to 30%.
- Space-Saving Design: These units are compact and can be mounted on walls, freeing up valuable floor space.
- Longer Lifespan: Tankless water heaters typically last 20 years or more, compared to 10-15 years for traditional tank heaters.
- Endless Hot Water: Say goodbye to cold showers! Tankless systems provide a continuous supply of hot water.
How to Choose the Best Tankless Water Heater
Before diving into our top picks, it’s important to understand the factors to consider when selecting the best tankless water heater for your home:
- Fuel Type: Tankless water heaters are available in gas (natural or propane) and electric models. Gas models are more powerful but require proper ventilation, while electric models are easier to install.
- Flow Rate: Measured in gallons per minute (GPM), the flow rate determines how much hot water the unit can deliver at once. Choose a model that meets your household’s peak demand.
- Energy Efficiency: Look for units with a high Energy Factor (EF) rating to maximize energy savings.
- Size and Installation: Consider the physical size of the unit and whether it can be easily installed in your home.
- Budget: Tankless water heaters vary in price, so choose one that fits your budget while meeting your needs.
Top 7 Best Tankless Water Heaters in 2024
Now that you know what to look for, let’s dive into our top 7 picks for the best tankless water heater models available this year.
1. Rinnai RU199iN Ultra Series Natural Gas Tankless Water Heater

The Rinnai RU199iN is a top-tier natural gas tankless water heater known for its exceptional performance and reliability. With a flow rate of up to 11 GPM, this unit can easily handle the hot water demands of large households.
Key Features:
- High Efficiency: Boasts an Energy Factor (EF) of 0.92, making it one of the most energy-efficient models on the market.
- Advanced Technology: Equipped with Rinnai’s Circ-Logic technology, which helps circulate hot water faster and more efficiently.
- Compact Design: Its sleek, space-saving design makes it ideal for homes with limited space.
Why It’s the Best:
The Rinnai RU199iN is perfect for homeowners seeking a high-performance, energy-efficient tankless water heater that can handle multiple applications simultaneously.
2. EcoSmart ECO 27 Electric Tankless Water Heater

For those who prefer electric models, the EcoSmart ECO 27 is a standout choice. This unit is designed for medium to large homes and offers a flow rate of up to 6.5 GPM.
Key Features:
- Energy Savings: Uses 99.8% of the energy consumed to heat water, significantly reducing energy costs.
- Self-Modulating Technology: Adjusts power output based on water flow and temperature, ensuring consistent performance.
- Easy Installation: Compact and lightweight, making it easy to install in tight spaces.
Why It’s the Best:
The EcoSmart ECO 27 is an excellent option for eco-conscious homeowners who want an affordable, energy-efficient electric tankless water heater.
3. Stiebel Eltron Tempra 36 Plus Electric Tankless Water Heater

The Stiebel Eltron Tempra 36 Plus is a premium electric tankless water heater that combines advanced technology with sleek design. With a flow rate of up to 7.2 GPM, it’s ideal for larger households.
Key Features:
- Advanced Flow Control: Maintains a constant water temperature even during fluctuations in water pressure.
- Energy Efficient: Uses advanced flow modulation to reduce energy consumption.
- Compact and Quiet: Its compact design and quiet operation make it a great addition to any home.
Why It’s the Best:
The Stiebel Eltron Tempra 36 Plus is perfect for homeowners who prioritize consistent water temperature and energy efficiency.
4. Rheem RTGH-95DVLN Natural Gas Tankless Water Heater

The Rheem RTGH-95DVLN is a high-performance natural gas tankless water heater designed for residential use. With a flow rate of up to 9.5 GPM, it’s capable of meeting the hot water needs of most households.
Key Features:
- Durable Construction: Made with high-quality materials for long-lasting performance.
- Energy Efficient: Features a 0.93 Energy Factor (EF) rating, ensuring maximum energy savings.
- Easy to Use: Equipped with a digital temperature control system for precise adjustments.
Why It’s the Best:
The Rheem RTGH-95DVLN is a reliable and efficient option for homeowners looking for a durable and high-performing tankless water heater.
5. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

The Takagi T-KJr2-IN-NG is a compact and affordable natural gas tankless water heater that’s perfect for small to medium-sized homes. With a flow rate of up to 6.6 GPM, it’s a great choice for households with moderate hot water needs.
Key Features:
- Compact Design: Its small size makes it easy to install in tight spaces.
- Energy Efficient: Features a 0.82 Energy Factor (EF) rating, helping you save on energy costs.
- Durable: Built with high-quality materials for long-lasting performance.
Why It’s the Best:
The Takagi T-KJr2-IN-NG is an excellent choice for homeowners on a budget who still want a reliable and efficient tankless water heater.
6. Noritz NRC98DV-NG Condensing Tankless Water Heater

The Noritz NRC98DV-NG is a high-efficiency condensing tankless water heater designed for large households. With a flow rate of up to 9.8 GPM, it’s perfect for homes with high hot water demands.
Key Features:
- Condensing Technology: Maximizes energy efficiency by capturing heat from exhaust gases.
- Durable Construction: Built with stainless steel components for long-lasting performance.
- Easy Installation: Features a compact design and flexible installation options.
Why It’s the Best:
The Noritz NRC98DV-NG is ideal for homeowners who need a powerful and energy-efficient tankless water heater for large families.
7. Bosch Tronic 3000 T Electric Tankless Water Heater

The Bosch Tronic 3000 T is a reliable and affordable electric tankless water heater designed for point-of-use applications. With a flow rate of up to 4 GPM, it’s perfect for small homes or as a supplementary unit.
Key Features:
- Compact Design: Its small size makes it easy to install under sinks or in tight spaces.
- Energy Efficient: Uses advanced heating technology to reduce energy consumption.
- Durable: Built with high-quality materials for long-lasting performance.
Why It’s the Best:
The Bosch Tronic 3000 T is an excellent choice for homeowners who need a compact and affordable tankless water heater for specific applications.
Installation and Maintenance Tips for Tankless Water Heaters
Once you’ve chosen the best tankless water heater for your home, proper installation and maintenance are key to ensuring optimal performance and longevity.
Installation Tips:
- Hire a Professional: While some units are DIY-friendly, it’s often best to hire a licensed plumber or technician for installation.
- Check Ventilation Requirements: Gas models require proper ventilation to operate safely.
- Ensure Proper Sizing: Make sure the unit is sized correctly for your household’s hot water needs.
Maintenance Tips:
- Flush the System Annually: Regular flushing removes mineral buildup and ensures efficient operation.
- Inspect for Leaks: Check for leaks or corrosion periodically to prevent damage.
- Replace Filters: Clean or replace filters as recommended by the manufacturer.
Frequently Asked Questions About Tankless Water Heaters
1. Are tankless water heaters worth the investment?
Yes, tankless water heaters are worth the investment due to their energy efficiency, longer lifespan, and endless hot water supply.
2. Can a tankless water heater run out of hot water?
No, tankless water heaters provide a continuous supply of hot water as long as the unit is properly sized for your household’s needs.
3. How long do tankless water heaters last?
With proper maintenance, tankless water heaters can last 20 years or more.
4. Are tankless water heaters more expensive than traditional ones?
While the upfront cost of a tankless water heater is higher, the long-term energy savings and durability often make them more cost-effective.
Conclusion
Choosing the best tankless water heater for your home is a decision that can significantly improve your comfort and energy efficiency. Whether you opt for a gas or electric model, the key is to select a unit that meets your household’s hot water demands while staying within your budget. From the high-performance Rinnai RU199iN to the budget-friendly Takagi T-KJr2-IN-NG, our top 7 picks offer something for everyone.
By following the tips and recommendations in this guide, you’ll be well-equipped to make an informed decision and enjoy the benefits of a tankless water heater for years to come. So, why wait? Upgrade your home’s water heating system today and experience the convenience and efficiency of the best tankless water heater on the market!